Poly teaches you (by necessity) skills that make you a more lovable and valuable community member, skills that will be critical to know to cope with 21st century crises: communication skills, compersion, self-knowledge, honesty, patience, consensus-building, conflict resolution etc.

I try to warn people about this (I tell them I am polyamorous, and lazy, explain about compersion, and warn them of my selfishness and insensitivity and intolerance of neediness and expectation) but I still end up hurting people, which does make me unhappy.

Polyamory groups encourage the multilateral relationships where there is a replacement of jealousy with compersion, clear hierarchy of relationships or where or empathizing with a lover's joy with expectations are otherwise fixed.